package gitbucket.core.util

import org.scalatra.forms._
import org.scalatra.i18n.Messages

trait Validations {

    /**
   * Constraint for the identifier such as user name or page name.
   */
    val identifier: Constraint = new Constraint() {
        override def validate(name: String, value: String, messages: Messages): Option[String] =
            if (!value.matches("[a-zA-Z0-9\\-_.]+")) {
                Some(s"${name} contains invalid character.")
            } else if (value.startsWith("_") || value.startsWith("-")) {
                Some(s"${name} starts with invalid character.")
            } else { None }
    }

    /**
   * Constraint for the repository identifier.
   */
    val repository: Constraint = new Constraint() {
        override def validate(name: String, value: String, messages: Messages): Option[String] =
            if (!value.matches("[a-zA-Z0-9\\-\\+_.]+")) {
                Some(s"${name} contains invalid character.")
            } else if (value.startsWith("_") || value.startsWith("-")) {
                Some(s"${name} starts with invalid character.")
            } else { None }
    }

    /**
   * Constraint for the color pattern.
   */
    val color = pattern("#[0-9a-fA-F]{6}")

    /**
   * ValueType for the java.util.Date property.
   */
    def date(constraints: Constraint*): SingleValueType[java.util.Date] =
        new SingleValueType[java.util.Date]((pattern("\\d{4}-\\d{2}-\\d{2}") +: constraints)*) {
            def convert(value: String, messages: Messages): java.util.Date =
                new java.text.SimpleDateFormat("yyyy-MM-dd").parse(value)
        }

}
